Dresden 2026 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 37: Ultrafast electron dynamics at surface and interfaces – Poster (joint session O/TT)
TT 37.5: Poster
Dienstag, 10. März 2026, 14:00–16:00, P2
Studies of laser ablation of band-gap materials — •Markus Bonifer1,2, Sebastian T. Weber1, Nils Cremer2,3, Gabriel Schaumann2,3, and Baerbel Rethfeld1 — 1Department of Physics and Research Center OPTIMAS, RPTU University Kaiserslautern-Landau, Germany — 2Focused Energy GmbH, Im Tiefen See 45, 64293, Darmstadt, Hessen, Germany — 3Institute of nuclear physics (IKP), Technische Universität Darmstadt, Darmstadt, Germany
We aim to explore laser ablation as a possible approach for creating clean, well-defined microholes in polymers used for laser fusion targets where symmetry and control of surface roughness are important. Because polymers differ widely in their properties, general insights into laser material interaction are sought through modeling of density-dependent excitation in band-gap materials.
The theoretical models used are based on the density-dependent two-temperature model (nTTM) and extended multiple rate equations (EMRE). These calculations are intended to guide experimental studies carried out in collaboration with Focused Energy to identify suitable processing conditions and improve overall feature quality.
Keywords: Laser ablation; Ultrafast dynamics; Polymers